Watts 757-QT 4 - Part of the 757 Series ZA100F-3NH and a molded diaphragm separating

and a molded diaphragm separating the air inlet from the potable water supply to prevent spillage

Includes squared-hole light-duty grate and anti-splash dome strainer

Use two 1/2 meter (19

ZARB326-2IP

Watts 757-QT 4 - Part of the 757 Series ZA100F-3NH and a molded diaphragm separatingThis 4 inch lead free double check valve backflow preventer assembly is designed to prevent the reverse flow of water of non potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It is ideal for protection at cross connections identified as non health hazards and from other contaminants found at the service line